The thesis describes a completely new biofuel system to generate particle-free heat from combustion of ash-containing biofuel particles at high temperatures.The suggested system gives opportunities to introduce biofuels in new areas.Main components in the suggested system is a heat radiating combustion chamber intended for pulverized wood, combined with regenerators to extract heat from flue gases and simultaneously preheating the combustion air.The thesis contains a description of the suggested system, theoretical considerations, calculations regarding the combustion, and includes results from tests performed.The results from calculations and tests performed concludes that the system is workable and possible to apply..

Under de senaste åren har försäljningen av rättvis handelsprodukter ökat markant. Denna utveckling berättar om en växande medvetenhet om konsumtionens baksidor hos människor i allmänhet.Inom rättvis handelsrörelsen är aktörers och produkters visuella identitet ett aktuellt ämne och det pågår diskussioner om dessa, om än i andra termer. Det har dock ännu inte skrivits så mycket inom detta område vilket motiverar min undersökning.Den här uppsatsen behandlar frågeställningen Vilken form har rättvis handel? Hur framstår rättvis handels visuella identitet idag genom rörelsens aktörer och deras produkter? Frågeställningarna exemplifieras och besvaras i uppsatsen genom ett designpedagogiskt projekt. En workshop, med deltagare som hade en direkt eller indirekt anknytning till världsbutiken Fair Trade Shop i Stockholm, fungerade som en sorts utgångspunkt för projektet.

Today green tree retention, together with leaving dead wood, is a common practice with the aim to reduce negative impacts on biodiversity and environment due to clear-felling. To better understand whether this conservation practice also makes a long-term difference, it is important to know what happens to these trees after harvest. Few studies have made an assessment of what happens to retention trees over a longer time period. In this study I inventoried retention trees that were left at clear-cuts six, twelve and eighteen years ago. I carried out a re-inventory of 57 retention patches (divided into free-standing tree groups, small swamp forests and edge zones) and free standing dead trees, spread over 25 previous clear-cuts in central Sweden.

Detta examensarbete är utfört på uppdrag från AVL Södertälje Powertrain Engineering AB.Målet med arbetet har varit att utveckla ett styrsystem för ett elektroniskt styrt pneumatiskhydraulisktventilsystem på en encylindrig förbränningsmotor i en testcell. AVL är enoberoende firma som utvecklar drivlinor med förbränningsmotorer samt instrumenterings- ochtestsystem. Ventilsystemet, med ett fungerande styrsystem, ska användas i AVLs utvecklingsochforskningsarbete på förbränningsmotorer.Ventilsystemet,Free Valve Technology, är utvecklat av Cargine Engineering AB och består avelektroniskt styrda pneumatisk-hydrauliska aktivatorer som opererar en motorventil individuellt.Aktivatorernas styrsystem har utvecklats helt iSimulink och implementerats som en integreraddel i det av AVL utvecklade motorstyrsystemet Raptor. Hårdvaran och plattformen är ett rapidprototyping system från dSPACE GmbH. Systemet har visat sig fungera tillfredsställande i entestcellmiljö vid lyfthöjder större än 3 mm och varvtal lägre än 2500 rpm, även underförbränning.

This study is about exclusion and childrens role-play in Swedish preschools. 8 preschool teachers, in 4 different preschools, have been interviewed about exclusion and low and high rating roles in children's role-play. The interviews was recorded and then analyzed. Relevant research in this study was from Corsaro, Tellgren and Löfdahl amongst others, and the results of the interviews is what this study is based on. The study showed that one of the most common roles in childrens role-play is the role of mother and that the roles children play are based on social norms and values.

Varumärkesplacering i digitala spel i samband med belöning och bestraffning harundersökts i denna studie. Resultat från tidigare studier på varumärkesplacering i spelanvändes i utformningen av undersökningen. Tidigare undersökningar av belöningoch bestraffning och dess inverkan på minnet studerades också. Detta kan vara förstagången som varumärkesplacering i digitala spel undersöks i samband med interaktivbelöning och bestraffning.Två versioner av spelet Supertuxkart skapades för undersökningen; den ena medbelönings- och bestraffningsåterkoppling och den andra utan. Deltagare från Kina ochSverige medverkade i experimentet.Undersökningen visade att varumärken med belöning eller bestraffning har tydligaeffekter på deltagarnas memorering av varumärken.

Moldova is one of Europe?s poorest countries with a struggling business environment and an unpredictable political situation. The purpose of this thesis is to understand the implications of corruptions and why networks have come to play a key role in the Moldovan culture and if the formations of network are due to heritage or an effect of functionalism. The focus of the study is also to explain how the networks develop and the formation and maintenance of loyalty and trust among the members of the network. The study is of a qualitative nature that uses a key informant sampling method to get access to members of different business networks.

This essay examines Finnish artist Iiu Susiraja?s self-portraits in relation to Western traditions and tropes of the genre from the 20th century until today. I use an iconological/iconographic model to describe and to further interpret the images. The purpose is to find out which norms and conventions, within the art sphere and society as a whole, that Susiraja?s images reproduce or revolt against.

The purpose of this study is to investigate which types of cultural capital gives high status in the current field of ?the creative industry? ? a group which could be seen as a new power elite in Gothenburg ? and how people with the ?right? cultural capital is included in the field. The author is invited to several free events within this field, and is investigating the process of inclusion with an auto-ethnographic method. The study will show that the process of inclusion is working quite absolute in the field of the creative industry, and that the audiences are mainly homogenous: masculine, white, middle class, has a taste disposition of the ?eclectic omnivore?, has entrepreneurial knowledges and is an active social media agent.

This study is about exclusion and childrens role-play in Swedish preschools. 8 preschool teachers, in 4 different preschools, have been interviewed about exclusion and low and high rating roles in children's role-play. The interviews was recorded and then analyzed. Relevant research in this study was from Corsaro, Tellgren and Löfdahl amongst others, and the results of the interviews is what this study is based on. The study showed that one of the most common roles in childrens role-play is the role of mother and that the roles children play are based on social norms and values.

The purpose of this survey was to discern possible similarities and difference between how teachers in preschool and pre-class respond to children?s own initiative out of a power perspective. The results of this study is collect by observations that we have done in free and planned activity in both preschool and pre-class as well as a few interviews with some of the teachers. The results have shown that teacher?s responses to children?s own initiatives in preschool and pre-class to most part is similar, despite the difference in their commission.

In my study I have chosen to examine the mathematics in children's free play and everyday situations, with focus on sorting and classification. The purpose of the study was to see how children express their mathematical knowledge. I have chosen to use a qualitative method in my examination, here I did observations in a children's group where the children were between three and six years old. I also did interviews with the teacher's on the department to see how they relate to the mathematics and how they formulate the department to achieve as good a learning environment as possible.The result shows that the teacher's approach is incredible important to the children's learning ability and that they are always present to challenge and discuss together with the children. The observation indicates that children use mathematics all the time in their everyday situations and that it is the interaction between individuals and environment that affects children's development. .

The purpose of this study was to find possible explanations to why the studied herd had an increased incidence of abomasal displacements. The incidence of abomasal displacement in the herd was three times higher than the incidence of an average Swedish herd. The cows in this study were fed a total mixed ration. The different parameters studied were: energy content in food, nutritional content in food, body condition scoring, concomitant other diseases, and blood parameters of glucose, fructosamine, cholesterol, insulin, betahydroxybutyrat and free fatty acids. The author?s suggestions to decrease the problems are to decrease the energy content in the TMR to lower the cows? body condition scores in the dry period and changing the content in the TMR to increase the amount of NDF and adding structure in the form of chopped straw.

This study sets out to investigate how the roll of the teacher is constructed in the Swedish Teachers? Unions trade publication. Based on the theory of social constructionism we have used the method of critical discourse analysis to establish dominant trends and patterns in how the roll of teacher is constructed in editorials in Swedish Lärarnas Tidning. We have established that the conflict between a modernist school tradition and a postmodern society has resulted in a dominant, traditional teacher discourse which is being simultaneously challenged by both a market-orientated discourse and a professionalization discourse. Furthermore, we attempt to highlight how these ?ideal? constructions can create problems in terms of identity construction for teachers.

The sun is an endless energy source and the heat it produces can be used to heatup our homes. This technology is relatively old and was introduced in the late70-s. There are two kinds of solar collectors that are most frequently used todayand these are plain solar collectors and vacuum solar collectors. The plain solarcollectors are the once that are used the most but the vacuum solar collectorshave increased more as a percentage the last couple of years.The biggest question asked regarding an investment in solar heating is if theplant is economically profitable. This question has no direct answer because itis dependent on a couple of prerequisites.